This paper analyzed the structure of intelligent motor operating mechanism for high-voltage circuit breaker, and introduced the hardware composition of control system for the motor operating mechanism. The overall design of controller and software for motor operating mechanism were proposed in the aspects of panel control program, data acquisition program flow and software anti-interference, and a new intelligent motor operating mechanism for high-voltage circuit breaker was established. As compared with the operating mechanism for traditional high-voltage vacuum circuit breaker, the present one has many advantages such as simple structure, easy control, strong servo and high reliability.